#include<iostream>
using namespace std;
int main{
	int a=5,*pa=&a;
	char c='U',*pc=&c;
	float *pf=0;
	printf("size of a =%d,of pa=%d \n",sizeof(a),sizeof(pa));
	printf("size of c =%d,of pc=%d \n",sizeof(c),sizeof(pc));
	printf("size of a =%d,of pa=%d \n",sizeof(pa),*pf);
} 
